目的 提出一种儿童带环丝圈式间隙保持器的椅旁数字化设计与制作方法，并初步验证其临床可行性。 方法 选取10例因乳牙早失需要进行间隙保持的患儿为研究对象，采集患儿口内扫描数据建立缺牙数字模型，使用自主研发的儿童带环丝圈式间隙保持器设计软件，完成个性化带环与丝圈结构的快速设计，生成一体化带环丝圈式间隙保持器的数字模型。分别采用椅旁金属数控切削工艺（试验组）和技工室金属3D打印工艺（对照组）制作间隙保持器。对保持器进行模型试戴，邀请儿童口腔高年资专家采用视觉模拟评分法（VAS）从间隙保持器的密合度、就位稳定性两个方面进行评价，并进行统计学分析。 结果 试验组10例间隙保持器的设计及制作总时间均小于1 h。统计分析结果表明，2组间隙保持器均满足临床使用需求，试验组间隙保持器的密合度、稳定性优于对照组。 结论 本研究提出的儿童带环丝圈式间隙保持器的椅旁数字化设计与制作方法，可实现初次就诊当日佩戴间隙保持器，临床可行性好，具有良好的临床应用潜力。

Objective This study proposes a chairside digital design and manufacturing method for band and loop space maintainers and preliminarily validates its clinical feasibility. Methods Clinical cases of 10 children requiring space maintenance caused by premature loss of primary teeth were collected. Intraoral scan data of the affected children were also collected to establish digital models of the missing teeth. Using a pediatric band and loop space maintainer design software developed by our research team, a rapid personalized design of band and loop structures was achieved, and a digital model of an integrated band and loop space maintainer was ultimately generated. A chairside space maintainer was manufactured through metal computer numerical control machining for the experimental group, whereas metal 3D printing in the dental laboratory was used for the control group. A model fitting assessment was conducted for the space maintainers of both groups, and senior pediatric dental experts were invited to evaluate the clinical feasibility of the space maintainers with regard to fit and stability using the visual analogue scale scoring system. Statistical analysis was also performed. Results The time spent in designing and manufacturing the 10 space maintainers of the experimental group was all less than 1 h. Statistical analysis of expert ratings showed that the experimental group outperformed the control group with regard to fit and stability. Both types of space maintainers met clinical requirements. Conclusion The chairside digital design and manufacturing method for pediatric band and loop space maintainers proposed in this study can achieve same-day fitting of space maintainers at the first appointment, demonstrating good clinical feasibility and significant potential for clinical application.